AU4631600A - Quaternary ammonium compounds for froth flotation of silicates from an iron ore - Google Patents
Quaternary ammonium compounds for froth flotation of silicates from an iron ore Download PDFInfo
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- AU4631600A AU4631600A AU46316/00A AU4631600A AU4631600A AU 4631600 A AU4631600 A AU 4631600A AU 46316/00 A AU46316/00 A AU 46316/00A AU 4631600 A AU4631600 A AU 4631600A AU 4631600 A AU4631600 A AU 4631600A
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- quaternary ammonium
- iron ore
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 57
- 229910052742 iron Inorganic materials 0.000 title claims description 25
- 150000003856 quaternary ammonium compounds Chemical class 0.000 title claims description 20
- 238000009291 froth flotation Methods 0.000 title claims description 17
- 150000004760 silicates Chemical class 0.000 title description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 24
- 238000005188 flotation Methods 0.000 claims description 21
- -1 n-decyl Chemical group 0.000 claims description 18
- 125000002252 acyl group Chemical group 0.000 claims description 12
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 9
- 125000001931 aliphatic group Chemical group 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 125000002947 alkylene group Chemical group 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000000881 depressing effect Effects 0.000 claims description 7
- 229910001608 iron mineral Inorganic materials 0.000 claims description 7
- 239000007900 aqueous suspension Substances 0.000 claims description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 150000004676 glycans Chemical class 0.000 claims description 3
- 229920001282 polysaccharide Polymers 0.000 claims description 3
- 239000005017 polysaccharide Substances 0.000 claims description 3
- 150000001450 anions Chemical class 0.000 claims description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 2
- 229940027983 antiseptic and disinfectant quaternary ammonium compound Drugs 0.000 claims 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims 1
- 239000012141 concentrate Substances 0.000 description 20
- 235000008504 concentrate Nutrition 0.000 description 19
- 238000004140 cleaning Methods 0.000 description 8
- 229910004298 SiO 2 Inorganic materials 0.000 description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- 238000007792 addition Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229920002472 Starch Polymers 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000008107 starch Substances 0.000 description 4
- 235000019698 starch Nutrition 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 230000001143 conditioned effect Effects 0.000 description 3
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003760 tallow Substances 0.000 description 3
- 229910021532 Calcite Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 235000010980 cellulose Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052595 hematite Inorganic materials 0.000 description 2
- 239000011019 hematite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000576 supplementary effect Effects 0.000 description 2
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 1
- 244000215068 Acacia senegal Species 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 244000106483 Anogeissus latifolia Species 0.000 description 1
- 235000011514 Anogeissus latifolia Nutrition 0.000 description 1
- 241000416162 Astragalus gummifer Species 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920000896 Ethulose Polymers 0.000 description 1
- 239000001859 Ethyl hydroxyethyl cellulose Substances 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 239000001922 Gum ghatti Substances 0.000 description 1
- 229920000569 Gum karaya Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229920001615 Tragacanth Polymers 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000001412 amines Chemical group 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- IQDGSYLLQPDQDV-UHFFFAOYSA-N dimethylazanium;chloride Chemical compound Cl.CNC IQDGSYLLQPDQDV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 235000019326 ethyl hydroxyethyl cellulose Nutrition 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 235000019314 gum ghatti Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- 235000010494 karaya gum Nutrition 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- JZMJDSHXVKJFKW-UHFFFAOYSA-M methyl sulfate(1-) Chemical compound COS([O-])(=O)=O JZMJDSHXVKJFKW-UHFFFAOYSA-M 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 150000004804 polysaccharides Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/01—Organic compounds containing nitrogen
- B03D1/011—Quaternary ammonium compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/016—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
Description
WO 00/62937 PCT/SEOO/00678 Quaternary ammonium compounds for froth flotation of silicates from an iron ore The present invention relates to a froth flotation 5 process in which silicates are separated from an iron ore in the presence of a collector containing a quaternary ammonium compound having two aliphatic groups and/or acyl groups containing 6-14 carbon atoms. This collector has a high selectivity to concentrate silicates in the froth product, 10 while a high yield of iron minerals is maintained in the bottom concentrate or concentrates. Quaternary ammonium compounds are often utilised as collectors in froth flotation processes. Thus, it is described in WO 94/26419 to subject a calcite mineral to a 15 froth flotation process in the presence of a mixture con taining a quaternary compound and an alkylene oxide adduct of an alkylamine, as a collector component. WO 97/26995 describes the use of esterquats as flotation agent for nonsulphidic minerals. The quaternary ammonium compounds 20 contain acyl groups of 6-24 carbon atoms. In the working examples esterquats of not defined nature, dicocoalkyl dimethyl ammonium chloride or trimethyl tallow ammonium chloride are used as collectors for silicate-rich calcite ores with enhanced content of magnesium. US 3 960 715 relates 25 to a froth flotation process for separating siliceous gangue constituents from an iron ore performed in the presence of a cationic collector including quaternary amines, such as dodecyl trimethyl ammonium chloride. The article "Cationic Flotation of Silica From 30 Magnetic Iron-Ore Concentrates": H.C. Hedberg, MAOCS, U7 (1970: 5, 177-179), compares the effect of different cationic collectors. The tests show that the quaternary ammonium compounds, trimethyl coco ammonium chloride, trimethyl lauryl ammonium chloride and trimethyl tallow ammonium chloride were 35 not as efficient as coco primary amine acetate used as a standard.
WO 00/62937 PCT/SEOO/00678 2 The US Patent 4 995 998 discloses the use of fatty alcohol polyglycol ethers terminally blocked by hydrophobic radicals as co-collectors together with cationic or ampholytic surfactants in the flotation of non-sulfidic ores. 5 In Example 4, pure quartz sand is subjected to a froth flotation process in the presence of a lauryl trimethyl ammonium chloride. Although these flotation processes have positive effects, there is a clear tendency that the enriched iron 10 mineral either contains a too high silicate level (often essentially over 1% by weight) or a too low iron yield. Therefore, the main objective of the present invention is to develop a more selective froth flotation process resulting in a high yield of iron at a low silicate content. Another 15 objective of the invention is to obtain the improved flotation at a low dosage of the collector. According to the present invention it has been found that these objectives can be achieved by carrying out a reversed froth flotation process at a pH of 7-11 of an 20 aqueous suspension of a silicate-containing iron ore in the presence of a depressing agent of the iron mineral and a quaternary ammonium compound having the formula RiRiN+R 3
R
4 1/z XZ- M, in which the groups R, independently are hydrocarbon groups, 25 preferably aliphatic groups containing 6-14 carbon atoms and/or the group R2-(OR7)m - OR 8 -, where the groups R 2 independently are acyl groups containing 6-14 carbon atoms, the groups R 7 independently are alkylene groups containing 2-4 carbon atoms, the groups R 8 independently are alkylene 30 groups containing 2-3 carbon atoms and m is a number from 0 5, R 3 and R 4 independently are alkyl groups containing 1-4 carbon atoms or groups (R 5 0)p, where the groups R 5 indepen dently are alkylene groups having 2-4 carbon atoms and p is a number from 1-4, X is an anionic group, and z is the charge 35 of the anion X, the amount of the quaternary ammonium compound being 10-500 milligram per kg iron ore.
WO 00/62937 PCT/SEOO/00678 3 Preferably the groups R, are straight aliphatic groups containing 6-10 carbon atoms or branched aliphatic groups containing 8-13 carbon atoms and the groups R 2 are straight acyl groups containing 6-10 carbon atoms or branched 5 acyl groups containing 8-13 carbon atoms. These quaternary ammonium compounds having two comparatively small aliphatic groups and/or acyl groups exhibit even at low dosages an unexpected high selectivity for silicates and leave an iron-containing concentrate of 10 high purity and a very low content of silicates. The quaternary ammonium compounds are preferably added in an amount of 15-200 milligram per kg iron ore, and most pre ferably in an amount of 15-100 milligram per kg iron ore. Since the froth product from the rougher flotation 15 may contain considerable amounts of iron minerals, the froth product may be subjected to one or more, for example from 1 to 5, additional froth flotation steps (cleaning steps) after adding water and if desired, a complementary addition of the quaternary ammonium compound, the depressing agent and/or 20 other flotation chemicals. Normally, it is not necessary to make any supplementary addition of the collector. The bottom concentrate from the rougher flotation and the bottom con centrates from the subsequent froth flotation steps of the froth products are suitably combined to a final concentrate 25 having high yield of iron and a very low content of silicates. Preferred quaternary ammonium compounds are those, where the groups R 5 , R 7 and R 8 are the -C 2
H
4 - group and at least one of the groups R 3 and R 4 is an alkyl group, pre 30 ferably the methyl group. These compounds are easy to produce and have excellent properties. The groups R 1 are preferably n-octyl, n-decyl, 2-propylheptyl and/or methyl substituted alkyl groups having 9-13 carbon atoms. The groups R 2 are preferably 2-ethylhexanoyl, n-octanoyl, 2-propylheptanoyl and 35 methyl-substituted acyl groups containing 9-13 carbon atoms. The anionic group X is suitably a halogenide, such as chloride; an alkyl sulphate, such as methyl sulphate; WO 00/62937 PCT/SE00/00678 4 hydrogen sulphate; or a carboxylate, such as acetate. The quaternary ammonium compounds used in the flotation process are well known and there exists a comprehensive literature disclosing the methods of their preparation. 5 In the flotation process according to the invention, the iron ore can be ground together with water to the desired particle size. As a rule, at least 50% by weight of the ground ore has a particle size between 5 and 200 ym. The ground ore is then suspended in water, and fine material is 10 deslimed in conventional manner, for instance, by screening, settling or cycloning. Thereafter, an aqueous water slurry (pulp) is prepared from the deslimed ore and a depressing agent for the iron ore is normally added. The depressing agent could be a hydrophilic polysaccharide, e.g. starch, 15 such as corn starch activated by treatment with alkali and dextrin. Other examples of suitable hydrophilic poly saccharides are cellulose derivatives, such as carboxymethyl cellulose, sulphomethyl cellulose, methyl cellulose, hydroxyethyl cellulose and ethyl hydroxyethyl cellulose; 20 hydrophilic gums, such as gum arabic, gum karaya, gum tragacanth and gum ghatti; alginates; and starch derivatives, such as carboxymethyl starch and phosphate starch. The depressing agent is normally added in an amount of about 10 to about 1000 g per tonne of ore. Besides, alkali is usually 25 added in an amount sufficient to obtain a pH of 7-11, pre ferably 9-11. After conditioning of the pulp, the quaternary ammonium compounds can be added and the mixture is further conditioned for a while before the froth flotation is carried out. If desired, froth-regulating means can be added on a 30 convenient occasion before the froth flotation. Examples of suitable froth-regulating additives are methyl isobutyl carbinol and alcohols having 6-12 carbon atoms which optionally are alkoxylated with ethylene oxide and/or propylene oxide. 35 The Examples below further illustrate the present invention.
WO 00/62937 PCT/SEOO/00678 5 Example 1 A hematite ore containing about 13.1% by weight of SiO 2 and about 85,9% by weight Fe 2
O
3 was ground to such a particle size that 45.4% by weight passed a screen having a 5 mesh opening of 32 Lm. Then the ore was suspended in water and deslimed by a hydrocyclone, and an aqueous pulp of the deslimed ore was prepared with a dry content of 60%. After addition of 500 mg of starch treated with alkali per kg ore the pulp was conditioned for 5 minutes. The concentration of 10 ore in the pulp was then reduced by addition of water to 40%, the pH-value of the pulp adjusted to 10.5 and a collector added in the amounts stated in table 2. The whole mixture was then conditioned for 60 seconds followed by rougher flota tion, whereby a silicate-rich froth product and an iron-rich 15 bottom concentrate were obtained. The froth product was cleaned by means of a second flotation step (cleaning step) without any additions of collectors or other additives and the bottom concentrate from the cleaning step was added to the bottom concentrate from the rougher flotation. This 20 cleaning process was repeated one or three times and the bottom concentrate from the rougher flotation and the bottom concentrates from the different cleaning steps were combined. The bottom concentrate from the rougher flotation and the different combined bottom concentrates were analysed with 25 respect to the yield of iron (Fe 2
O
3 ) and the content of silicate (SiO 2 ). The results are shown in table 2 below. Table I Collectors Designation Symbol Structure A C 8 -Cio-alkyl-O-C3H 6
NH
2 B Coco fatty alkyl (CH 3
)
3 N+ Cl~ 1 (n-octyl)2 (CH 3
)
2 N+ Cl~ 2 (2-ethylhexyl-OC2H4)2
(CH
3
)
2 N+ Cl~ 3 20% (n-octyl)2 (CH 3
)
2 N+ Cl~ 80% (n-decyl) 2
(CH
3 ) 2 N+ Cl~ WO 00/62937 PCT/SE0O/00678 6 Table 2 Flotation results Coll Add. Sym- mg/kg Bottom concentrates bol ore Yield Fe 2
O
3 , % Content SiO 2 , % A 30 90.8 98.0 99.7 - - 0.79 2,02 4,85 - B 60 69.0 81.1 87.6 - - 1.11 2.65 4.85 - 1 20 81.4 91.3 94.2 96.7 98.2 0.59 0.68 0.77 0.88 1.12 1 25 75.0 87.9 92.8 95.3 97.3 0.49 0.53 0.55 0.59 0.69 2 30 78.4 89.5 93.9 96.0 97.7 0.59 0.62 0.66 0.71 0.82 3 45 79.4 90.6 94.9 - - 0.54 0.66 0.80 - From the results it is evident that the collectors according 5 to the invention have a strong affinity and high selectivity for silicates. By repeated cleaning of the froth product it is also possible to obtain a combination of the bottom concentrates with an excellent yield of Fe 2 0 3 and a very low content of SiO 2 in comparison with the prior art. 10 Furthermore, the amounts of the collectors needed to perform the froth flotation process are astonishingly low. Example 2 An hematite ore containing 24.1% by weight of SiO 2 and about 73.6% by weight Fe 2 0 3 was ground to such a 15 particle size that 27.2% by weight passed a screen having a mesh opening of 32 gm. An aqueous suspension of the material ground was then prepared in the same manner as in Example 1. The iron ore suspensions were subjected to rougher flota tions, which were followed by one or more cleaning steps of 20 the froth products. In the cleaning processes no supple mentary addition of flotation chemicals was made. The bottom concentrate from the rougher flotation and the different combined bottom concentrates were analysed with respect to the total yield of iron (Fe 2 0 3 ) and the content of silicate 25 (SiO 2 ). The results obtained are shown in Table 4 below.
WO 00/62937 PCT/SEOO/00678 7 Table 3 Collectors Symbol Structure A See Example 1 B See Example 1 C Tallow fatty alkyl (CH 3 ) 3 N+ Cl~ 1 See Example 1 2 See Example 1 3 n-C 10
H
2 1 . CH 3 Cl N+ l n-C 8
H
1 7
CH
3 4 (methyl branched C 1 1 -alkyl) 2
(CH
3
)
2 N+ Cl~ 5 (methyl branched C 1 2
-C
1 3 -alkyl) 2
(CH
3
)
2 N+ Cl~ 6 (coco fatty alkyl) 2
(CH
2
)
2 N+ Cl~ Table 4 Flotation results Coll Add. Sym- mg/kg Bottom concentrates bol ore Yield Fe 2 0 3 , % Content SiO 2 , % A 100 86.3 96.3 98.8 - - 1.2 2.3 4.1 - B 200 77.7 91.1 - - - 24.1 24.8 - - C 200 74.7 89.0 - - - 1.2 1.3 - - C 100 82.1 94.4 - - - 8.2 10.2 - - 1 45 84.4 93.6 96.4 97.7 98.4 0.91 1.01 1.12 1.23 1.4 1 60 81.5 91.4 94.9 - - 0.88 0.96 1.06 - 2 45 86.8 94.8 97.3 - - 0.98 1.08 1.18 - 2 60 83.1 92.2 95.3 - - 0.87 0.97 1.07 - 3 60 86.1 94.8 - - - 0.97 1.2 - 4 60 89.3 96.8 - - - 1.02 1.4 - - 5 100 92.7 98.6 - - - 0.85 1.3 - - 6 150 92.4 98.5 - - - 0.98 1.5 - - 5 The flotation results are similar to the results in Example 1. The collectors according to the invention have a strong affinity and selectivity for silicates already at a low dosage, especially the collectors having short chain ali phatic or acyl groups.
Claims (9)
1. A process for enriching an iron mineral from a silicate-rich iron ore by performing a reversed froth flotation of an aqueous suspension of the iron ore at a pH of 5 7-11 in the presence of a collector containing a quaternary ammonium compound and a depressing agent for the iron mineral, characterized in that the collector is a quaternary ammonium compound having the formula RiRiN+R 3 R 4 1/z Xz- (I) 10 in which the groups R, independently are hydrocarbon groups, preferably aliphatic groups containing 6-14 carbon atoms and/or the group R2-(OR7)m - OR 8 -, where the groups R 2 independently are acyl groups containing 6-14 carbon atoms, the groups R 7 independently are alkylene groups containing 15 2-4 carbon atoms, the groups R 8 independently are alkylene groups containing 2-3 carbon atoms and m is a number from 0 5, R 3 and R 4 independently are alkyl groups containing 1-4 carbon atoms or groups (R50)p, where the groups R 5 indepen dently are alkylene groups having 2-4 carbon atoms and p is a 20 number from 1-4, X is an anionic group, and z is the charge of the anion X, the amount of the quaternary ammonium com pounds being 10-500 milligram per kg iron ore.
2. Process according to claim 1, characterized in that the groups R, independently are straight, aliphatic groups 25 containing 6-10 carbon atoms or branched aliphatic groups containing 8-13 carbon atoms or the group R2-(OR7)m - OR8-, where R 7 , R 8 and m have the meaning mentioned in claim 1 and the groups R 2 independently are straight, acyl groups con taining 6-10 carbon atoms or branched acyl groups containing 30 8-13 carbon atoms.
3. Process according to claim 1 or 2, characterized in that R 5 , R 7 and R 8 are the group -C 2 H 4 - and at least one of the groups R 3 and R 4 is an alkyl group.
4. Process according to claims 1, 2 or 3, characterized 35 in that the quaternary ammonium compound is present in an amount of 15-200 milligram per kilo iron ore. WO 00/62937 PCT/SEOO/00678 9
5. Process according to any one of claims 1-4, characterized in that the groups Ri independently are n octyl, n-decyl, 2-propylheptyl and methyl-substituted alkyl groups containing 9-13 carbon atoms. 5
6. Process according to any one of claims 1-4, characterized in that the groups R 2 independently are 2 ethylhexanoyl, n-octanoyl, 2-propylheptanoyl and methyl substituted acyl groups containing 9-13 carbon atoms.
7. Process according to any one of claims 1-6, 10 charazterized in that a hydrophilic polysaccharide is added to the aqueous suspension as a depressing agent for the iron mineral before the addition of the quaternary ammonium compound.
8. Process according to claim 7, characterized in that 15 the froth product obtained from the flotation of the aqueous suspension of the iron ore is subjected to at least one additional froth flotation process.
9. Use of a quaternary ammonium compound as defined in claims 1-6 as collector for enriching an iron mineral from a 20 silicate-rich iron ore by a reversed froth flotation process.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9901398A SE514435C2 (en) | 1999-04-20 | 1999-04-20 | Quaternary ammonium compounds for foam flotation of silicates from iron ore |
SE9901398 | 1999-04-20 | ||
PCT/SE2000/000678 WO2000062937A1 (en) | 1999-04-20 | 2000-04-10 | Quaternary ammonium compounds for froth flotation of silicates from an iron ore |
Publications (2)
Publication Number | Publication Date |
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AU4631600A true AU4631600A (en) | 2000-11-02 |
AU763599B2 AU763599B2 (en) | 2003-07-24 |
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Application Number | Title | Priority Date | Filing Date |
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AU46316/00A Ceased AU763599B2 (en) | 1999-04-20 | 2000-04-10 | Quaternary ammonium compounds for froth flotation of silicates from an iron ore |
Country Status (13)
Country | Link |
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US (1) | US7311206B1 (en) |
CN (1) | CN1130269C (en) |
AU (1) | AU763599B2 (en) |
BR (1) | BR0000157B1 (en) |
CA (1) | CA2366948C (en) |
EA (1) | EA003556B1 (en) |
EG (1) | EG22704A (en) |
NO (1) | NO321799B1 (en) |
OA (1) | OA11860A (en) |
SE (1) | SE514435C2 (en) |
UA (1) | UA71956C2 (en) |
WO (1) | WO2000062937A1 (en) |
ZA (1) | ZA200108190B (en) |
Families Citing this family (18)
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DE102006010939A1 (en) | 2006-03-09 | 2007-09-13 | Clariant International Limited | Flotation reagent for silicates |
DE102006019561A1 (en) | 2006-04-27 | 2007-10-31 | Clariant International Limited | Use of an amine compound as collectors in silicate flotations, for the reverse flotation of silicate containing minerals from e.g. iron ore, for the cleaning of silicate sand and in the flotation of quartz, glimmer, feldspar and muscovite |
EP2017009B1 (en) | 2007-07-20 | 2013-07-03 | Clariant (Brazil) S.A. | Reverse iron ore flotation by collectors in aqueous nanoemulsion |
CN101337204B (en) * | 2008-08-13 | 2011-03-30 | 中南大学 | Use of quaternaries compound in floating silicate mineral and silicate mineral floating trapping agent |
DE102008056338B4 (en) * | 2008-11-07 | 2012-02-16 | Clariant International Ltd. | Flotation reagent for siliceous minerals |
DE102010004893A1 (en) | 2010-01-19 | 2011-07-21 | Clariant International Limited | Flotation reagent for magnetite- and / or hematite-containing iron ores |
KR101784890B1 (en) * | 2010-05-28 | 2017-10-12 | 아크조 노벨 케미칼즈 인터내셔널 비.브이. | Use of quaternary ammonium compounds as collectors in froth flotation processes |
CN102125892B (en) * | 2010-12-07 | 2012-10-31 | 鞍钢集团矿业公司 | Manufacturing method of collector for three functional groups of lean hematite anionic reverse flotation |
JP6430381B2 (en) | 2012-09-04 | 2018-11-28 | ヴァーレ、ソシエダージ、アノニマVale S.A. | Use of modified sugarcane bagasse as a flotation inhibitor in iron ore flotation |
UA116361C2 (en) | 2012-10-01 | 2018-03-12 | Кеміра Ойй | Depressants for mineral ore flotation |
AU2013351085A1 (en) | 2012-11-30 | 2015-05-07 | Akzo Nobel Chemicals International B.V. | Flotation of silicates from ores |
CN102941160A (en) * | 2012-12-13 | 2013-02-27 | 贵州大学 | Flotation collector for silicate minerals |
CN105013620B (en) * | 2015-06-25 | 2017-07-07 | 西南科技大学 | A kind of spodumene efficient combination collecting agent and its preparation method and application |
CN105396698B (en) * | 2015-11-19 | 2018-01-05 | 中钢集团马鞍山矿山研究院有限公司 | A kind of compound quaternary ammonium salt cationic silicate mineral collecting agent and preparation method thereof |
CN106733209A (en) * | 2015-11-19 | 2017-05-31 | 中钢集团马鞍山矿山研究院有限公司 | A kind of preparation method of microfine iron ore reverse flotation collecting agent |
EP3208314B1 (en) | 2016-02-16 | 2018-08-15 | Omya International AG | Process for manufacturing white pigment containing products |
EP3208315A1 (en) | 2016-02-16 | 2017-08-23 | Omya International AG | Process for manufacturing white pigment containing products |
EP3444036A1 (en) | 2017-08-16 | 2019-02-20 | Omya International AG | Indirect flotation process for manufacturing white pigment containing products |
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US2341046A (en) * | 1940-10-07 | 1944-02-08 | Du Pont | Flotation |
US2410021A (en) * | 1944-04-26 | 1946-10-29 | Eric Mining Company | Flotation process |
US3363758A (en) * | 1966-12-08 | 1968-01-16 | Ashland Oil Inc | Use of primary aliphatic ether amine acid salts in froth flotation process |
US3960715A (en) | 1974-01-07 | 1976-06-01 | The Hanna Mining Company | Cationic froth flotation process |
BR7706938A (en) * | 1976-10-18 | 1978-08-08 | Akzona Inc | PRE-EMULSION MIXTURE, WATER EMULSION AND FOAM FLOTATION PROCESS |
CA1187212A (en) * | 1982-04-23 | 1985-05-14 | Gennard Delisle | Purification of calcite group minerals through flottation of their impurities |
US4830739A (en) * | 1985-02-20 | 1989-05-16 | Berol Kemi Ab | Process and composition for the froth flotation beneficiation of iron minerals from iron ores |
DE3818482A1 (en) | 1988-05-31 | 1989-12-07 | Henkel Kgaa | TENSIDE MIXTURES AS COLLECTORS FOR THE FLOTATION OF NON-SULFIDIC ORES |
US4892649A (en) * | 1988-06-13 | 1990-01-09 | Akzo America Inc. | Calcium carbonate beneficiation |
SE501623C2 (en) | 1993-05-19 | 1995-04-03 | Berol Nobel Ab | Ways to flotate calcium carbonate ore and a flotation reagent therefor |
DE19602856A1 (en) | 1996-01-26 | 1997-07-31 | Henkel Kgaa | Biodegradable ester quats as flotation aids |
-
1999
- 1999-04-20 SE SE9901398A patent/SE514435C2/en not_active IP Right Cessation
-
2000
- 2000-01-25 BR BRPI0000157-0A patent/BR0000157B1/en not_active IP Right Cessation
- 2000-04-10 WO PCT/SE2000/000678 patent/WO2000062937A1/en active IP Right Grant
- 2000-04-10 EA EA200101099A patent/EA003556B1/en not_active IP Right Cessation
- 2000-04-10 OA OA1200100259A patent/OA11860A/en unknown
- 2000-04-10 CN CN00806464A patent/CN1130269C/en not_active Expired - Fee Related
- 2000-04-10 CA CA2366948A patent/CA2366948C/en not_active Expired - Fee Related
- 2000-04-10 AU AU46316/00A patent/AU763599B2/en not_active Ceased
- 2000-04-15 EG EG20000472A patent/EG22704A/en active
- 2000-04-16 US US09/959,038 patent/US7311206B1/en not_active Expired - Fee Related
- 2000-10-04 UA UA2001107251A patent/UA71956C2/en unknown
-
2001
- 2001-10-05 ZA ZA200108190A patent/ZA200108190B/en unknown
- 2001-10-12 NO NO20014978A patent/NO321799B1/en not_active IP Right Cessation
Also Published As
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NO20014978L (en) | 2001-10-12 |
OA11860A (en) | 2006-03-02 |
CN1347345A (en) | 2002-05-01 |
AU763599B2 (en) | 2003-07-24 |
SE9901398D0 (en) | 1999-04-20 |
EA003556B1 (en) | 2003-06-26 |
CA2366948A1 (en) | 2000-10-26 |
BR0000157A (en) | 2001-01-16 |
WO2000062937A1 (en) | 2000-10-26 |
US7311206B1 (en) | 2007-12-25 |
NO321799B1 (en) | 2006-07-03 |
SE9901398L (en) | 2000-10-21 |
BR0000157B1 (en) | 2011-05-17 |
EG22704A (en) | 2003-07-30 |
CN1130269C (en) | 2003-12-10 |
UA71956C2 (en) | 2005-01-17 |
NO20014978D0 (en) | 2001-10-12 |
CA2366948C (en) | 2010-08-03 |
EA200101099A1 (en) | 2002-04-25 |
SE514435C2 (en) | 2001-02-26 |
ZA200108190B (en) | 2003-04-30 |
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